Terminal, base station, system and wireless communication method

Abstract

A terminal according to one embodiment of the present disclosure includes: a control unit, which determines the correspondence between the bits of the Transmitted Precoding Matrix Indicator (TPMI) group capability information and the TPMI group based on whether the antenna port switching between any antenna port pairs is supported; and a transmitting unit, which transmits the TPMI group capability information corresponding to the TPMI group supporting full power transmission based on the correspondence. According to one embodiment of the present disclosure, full power transmission can be appropriately controlled.

Description

Technical Field

[0001] The present disclosure relates to a terminal, a wireless communication method, and a base station in a next-generation mobile communication system. Background Art

[0002] In the Universal Mobile Telecommunications System (UMTS) network, Long Term Evolution (LTE) is standardized for the purpose of further high-speed data rate, low latency, etc. (Non-Patent Document 1). In addition, LTE-Advanced (3GPP Rel. 10-14) is standardized for the purpose of further increasing the capacity and sophistication of LTE (Release (Rel.) 8, 9 of the Third Generation Partnership Project (3GPP)).

[0003] Successor systems of LTE (also known as, for example, 5th generation mobile communication system (5G), 5G+(plus), 6th generation mobile communication system (6G), New Radio (NR), 3GPP Rel.15 and later, etc.) are also being studied.

[0004] Prior art literature

[0005] Non-patent literature

[0006] Non-patent document 1: 3GPP TS 36.300 V8.12.0 “Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall Description; Stage 2 (Release 8)”, April 2010 Summary of the invention

[0007] Problems to be solved by the invention

[0008] In NR, user terminal (UE) capabilities associated with codebook-based full-power UL transmission using multiple power amplifiers (PA) are being studied. In the NR discussions so far, the following UE capabilities 1-3 have been proposed:

[0009] UE capability 1: Support (or have) a PA capable of outputting maximum rated power (full rated PA) in each transmit chain,

[0010] UE capability 2: None of the transmit chains supports full-rated PA,

[0011] UE capability 3: A subset (part) of the transmit chain supports the full rated PA.

[0012] In addition, the case where a UE supporting UE capability 2 or 3 is set to at least one of the two modes (mode 1, 2) for full power transmission operation is being studied. In Rel.16NR, the case where a UE reports UE capability information indicating support for mode 1, or reports UE capability information indicating support for mode 2, or reports UE capability information related to a TPMI set (also referred to as a TPMI group) capable of full power transmission associated with mode 2 is being studied.

[0013] However, no research has been conducted on which TPMI group the UE should report. If the appropriate TPMI group is not reported, the UE cannot properly perform full power transmission. If full power transmission cannot be performed, coverage is reduced, and there is a concern that the increase in communication throughput will be suppressed.

[0014] Therefore, one of the objects of the present disclosure is to provide a terminal, a wireless communication method, and a base station capable of appropriately controlling full-power transmission.

[0015] Means for solving problems

[0016] A terminal involved in one embodiment of the present disclosure comprises: a control unit, which controls the correspondence between the bits of the Transmitted Precoding Matrix Indicator (TPMI) group capability information and the TPMI group based on whether antenna port switching between any antenna port pairs is supported; and a sending unit, which sends the TPMI group capability information corresponding to the TPMI group supporting full-power transmission based on the correspondence.

[0017] Effects of the Invention

[0018] According to one aspect of the present disclosure, full power transmission can be appropriately controlled. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a diagram showing an example of the relationship between the precoder type and the TPMI index.

[0020] Figure 2 This is a diagram showing an example of a UE configuration assumed by UE capabilities 1-3 associated with full-power transmission.

[0021] Figure 3A as well as Figure 3B This is a diagram showing an example of the TPMI group.

[0022] Figure 4 This is a diagram showing an example of a TPMI group indicated by TPMI group capability information in the first embodiment.

[0023] Figure 5 This is a diagram showing an example of a PA structure of partially coherent UE corresponding to each group or a combination of groups in the first embodiment.

[0024] Figure 6 This is a diagram showing an example of a PA configuration corresponding to a reported group or a group of groups in the first embodiment.

[0025] Figure 7 This is a diagram showing another example of the TPMI group indicated by the TPMI group capability information in the first embodiment.

[0026] Fig. 8A as well as Figure 8B This is a diagram showing an example of a port and PA configuration that are capable of full-power transmission and are associated with G7.

[0027] Fig. 9 This is a diagram showing an example of a TPMI group indicated by TPMI group capability information in the second embodiment.

[0028] Fig.10 This is a diagram showing an example of a PA configuration corresponding to a reported group or a group of groups in the second embodiment.

[0029] Fig.11 This is a diagram showing another example of a TPMI group indicated by TPMI group capability information in the second embodiment.

[0030] Fig.12 This is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment.

[0031] Fig.13 This is a diagram showing an example of the configuration of a base station according to an embodiment.

[0032] Fig.14 This is a diagram showing an example of a configuration of a user terminal according to an embodiment.

[0033] Fig.15 This is a diagram showing an example of the hardware configuration of a base station and a user terminal according to an embodiment. DETAILED DESCRIPTION

[0034] (PUSCH precoder)

[0035] In NR, a case where a UE supports at least one of codebook-based transmission (Codebook (CB)) and non-codebook-based transmission (Non-Codebook (NCB)) is being studied.

[0036] For example, research is underway to determine the situation in which the UE uses at least the measurement reference signal (Sounding Reference Signal (SRS)) resource index (SRS Resource Index (SRI)) to determine the precoder (precoding matrix) used for sending the uplink shared channel (Physical Uplink Shared Channel (PUSCH)) based on at least one of the CB-based and NCB-based uplink shared channels.

[0037] In the case of CB-based transmission, the UE may also determine the precoder for PUSCH transmission based on SRI, Transmitted Rank Indicator (TRI), and Transmitted Precoding Matrix Indicator (TPMI). In the case of NCB-based transmission, the UE may also determine the precoder for PUSCH transmission based on SRI.

[0038] SRI, TRI, TPMI, etc. can also be notified to the UE using downlink control information (Downlink Control Information (DCI)). SRI can be specified by the SRS resource indicator field (SRSResource Indicator field (SRI field)) of DCI, or by the parameter "srs-ResourceIndicator" contained in the RRC information element "ConfiguredGrantConfig" that sets the grant PUSCH (configuredgrant PUSCH). TRI and TPMI can also be specified by the precoding information and number of layers field ("Precoding information and number of layers" field) of DCI.

[0039] The UE may also report UE capability information related to the precoder type, and the base station may set the precoder type based on the UE capability information through high-layer signaling. The UE capability information may also be information about the precoder type used by the UE in PUSCH transmission (which may also be represented by the RRC parameter "pusch-TransCoherence").

[0040] In the present disclosure, the high-layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, etc., or a combination thereof.

[0041] MAC signaling may use, for example, MAC Control Element (MAC CE), MAC Protocol Data Unit (PDU), etc. Broadcast information may also use, for example, Master Information Block (MIB), System Information Block (SIB), etc.

[0042] The UE may also determine the precoder used in PUSCH transmission based on the information of the precoder type included in the PUSCH configuration information (the "PUSCH-Config" information element of the RRC signaling) notified by the higher layer signaling (which may also be represented by the RRC parameter "codebookSubset"). The UE may also be configured with a subset of the PMI specified by the TPMI through the codebookSubset.

[0043] In addition, the precoder type can also be specified by any one of fully coherent (full coherent, fully coherent, coherent), partially coherent (partial coherent) and non coherent (non coherent, incoherent) or a combination of at least two of them (for example, it can also be expressed by parameters such as "fullyAndPartialAndNonCoherent", "partialAndNonCoherent", etc.).

[0044] Full coherence may also mean that synchronization of all antenna ports used in transmission has been achieved (which may also be expressed as being able to make phases consistent, the same precoder used, etc.). Partial coherence may also mean that although synchronization has been achieved between some of the antenna ports used in transmission, the ports in this part have not been synchronized with other ports. Incoherence may also mean that synchronization of the antenna ports used in transmission has not been achieved.

[0045] In addition, a UE supporting a fully coherent precoder type may also be considered to support a partially coherent and non-coherent precoder type. A UE supporting a partially coherent precoder type may also be considered to support a non-coherent precoder type.

[0046] In the present disclosure, the precoder type may also be replaced by coherency, PUSCH transmission coherence, coherent type, coherence type, codebook type, codebook subset, codebook subset type, etc.

[0047] The UE may determine the precoding matrix corresponding to the TPMI index obtained from the DCI (eg, DCI format 0_1, the same below) sent by the scheduling UL based on multiple precoders (which may also be referred to as precoding matrices, codebooks, etc.) used for CB-based transmission.

[0048] Figure 1 This is a diagram showing an example of the relationship between the precoder type and the TPMI index. Figure 1This table corresponds to a precoding matrix W for single-layer transmission using four antenna ports in DFT-s-OFDM (Discrete Fourier Transform spread OFDM, transform precoding effective).

[0049] exist Figure 1 In the case where the precoder type (codebookSubset) is fullyAndPartialAndNonCoherent, for single-layer transmission, the UE is notified of any TPMI from 0 to 27. In addition, when the precoder type is partialAndNonCoherent, for single-layer transmission, the UE is set to any TPMI from 0 to 11. When the precoder type is nonCoherent, the UE is set to any TPMI from 0 to 3 for single-layer transmission.

[0050] Figure 1 This is a table specified in Rel.15NR. In this table, if the fully coherent transmission power corresponding to indexes 12 to 27 is set to 1 (= (1 / 2) 2 *4), the coherent transmission power corresponding to the part with indexes 4 to 11 is 1 / 2 (= (1 / 2) 2 *2), the incoherent transmission power corresponding to indexes 0 to 3 is 1 / 4 (= (1 / 2) 2 *1).

[0051] That is, according to the Rel.15NR specification, when the UE uses multiple ports to perform codebook-based transmission, if a part of the codebook is used, the transmission power sometimes becomes smaller than that of a single port (full-power transmission cannot be performed).

[0052] In addition, if Figure 1 As shown, a precoding matrix in which only one of the components of each column is not 0 can also be called a non-coherent codebook. A precoding matrix in which only a specific number (not all) of the components of each column are not 0 can also be called a partially coherent codebook. A precoding matrix in which all the components of each column are not 0 can also be called a fully coherent codebook.

[0053] Non-coherent codebooks and partially coherent codebooks may also be referred to as antenna selection precoders. Fully coherent codebooks may also be referred to as non-antenna selection precoders.

[0054] In addition, in the present disclosure, the partially coherent codebook may also be equivalent to a codebook (precoding matrix) corresponding to the TPMI specified by DCI for a UE with a partially coherent codebook subset (for example, RRC parameter "codebookSubset" = "partialAndNonCoherent") set for codebook-based transmission, from which the codebook corresponding to the TPMI specified for a UE with a non-coherent codebook subset (for example, RRC parameter "codebookSubset" = "nonCoherent") is removed (that is, if it is a single-layer transmission of four antenna ports, it is a codebook with TPMI = 4 to 11).

[0055] In addition, in the present disclosure, the fully coherent codebook may also be equivalent to a codebook (precoding matrix) corresponding to the TPMI specified by DCI for a UE with a fully coherent codebook subset (for example, RRC parameter "codebookSubset" = "fullyAndPartialAndNonCoherent") set for codebook-based transmission, from which the codebook corresponding to the TPMI specified for a UE with a partially coherent codebook subset (for example, RRC parameter "codebookSubset" = "partialAndNonCoherent") is removed (that is, if it is a single-layer transmission of four antenna ports, it is a codebook with TPMI = 12 to 27).

[0056] (UE capability to transmit at full power)

[0057] Even when using a codebook, it is preferred to perform full-power UL transmission appropriately. Therefore, in NR, UE capabilities associated with full-power UL transmission based on a codebook using multiple power amplifiers (Power Amplifiers (PA)) are being studied. In the discussion of NR so far, the following UE capabilities 1-3 have been proposed:

[0058] UE capability 1: Support (or have) a PA capable of outputting maximum rated power (full rated PA) in each transmit chain,

[0059] UE capability 2: None of the transmit chains supports full-rated PA,

[0060] UE capability 3: A subset (part) of the transmit chain supports the full rated PA.

[0061] In addition, a UE having at least one of the UE capabilities 1-3 may also mean supporting full power of UL transmission. Independently of UE capabilities 1-3, the UE may also report capability information indicating support for UL full power transmission capability to the network (e.g., a base station). The UE may also be set by the network to support full power transmission.

[0062] The UE capability 1 / 2 / 3 may also be replaced by UE capability 1 / 2 / 3 related to full power transmission, full power transmission type 1 / 2 / 3, power allocation type 1 / 2 / 3, etc. In the present disclosure, type, mode, capability, etc. may also be replaced with each other. In addition, in the present disclosure, 1 / 2 / 3 may also be replaced by a set of any numbers or characters such as A / B / C.

[0063] Figure 2 1 is a diagram showing an example of a UE configuration assumed by UE capabilities 1-3 associated with full power transmission. As a UE configuration, Figure 2 Only the PA and the transmission antenna port (which may also be replaced by the transmission antenna) are shown in simplified form. In addition, an example in which the number of the PA and the number of the transmission antenna ports are 4 are shown, but the present invention is not limited to this.

[0064] In addition, P represents the maximum output power of UE [dBm], P PA Indicates the maximum output power of the PA [dBm]. In addition, regarding P, for example, it can also be 23dBm in a UE of power level 3, and it can also be 26dBm in a UE of power level 2. In the present disclosure, it is assumed that P PA ≤P, but the embodiments of the present disclosure may also be applied to P PA >P situation.

[0065] The structure of UE capability 1 is assumed to be high in cost, but it is possible to use one or more arbitrary antenna ports for full power transmission. The structure of UE capability 2 includes only non-full-rated PAs and is expected to be cheaply implemented, but since full power transmission cannot be performed using only one antenna port, it is required to control the phase, amplitude, etc. of the signal input to each PA. In addition, UE capability 1 can also be called mode 0.

[0066] The structure of UE capability 3 is between the structure of UE capability 1 and the structure of UE capability 2. Antenna ports that can transmit at full power (in this case, transmit antennas #0 and #2) and antenna ports that cannot transmit at full power (in this case, transmit antennas #1 and #3) are mixed.

[0067] In addition, the index and number of antenna ports capable of full power transmission of UE capability 3 are not limited to this. In addition, in this example, it is assumed that the P of a non-full rated PA PA =P / 2, but P PAThe value of is not limited to this.

[0068] However, a case where a UE supporting UE capability 2 or 3 is set to at least one of two modes (mode 1, 2) for full power transmission operation is under study. Modes 1 and 2 may also be referred to as operation modes 1 and 2, respectively.

[0069] Here, mode 1 may also be a mode in which one or more SRS resources included in an SRS resource set whose usage is "codebook" of the UE have the same number of SRS ports (for example, it may also be referred to as the first full-power transmission mode). A UE operating in mode 1 may also use all antenna ports for full-power transmission.

[0070] A UE operating in mode 1 may also be configured by the network to use a subset of TPMI that combines ports within a layer for full power transmission. A new codebook subset may also be introduced only for rank values ​​that cannot be used for full power transmission, the new codebook subset including a TPMI precoder corresponding to "fullyAndPartialAndNonCoherent" defined in Rel.15NR.

[0071] On the other hand, mode 2 may also be a mode in which one or more SRS resources included in an SRS resource set whose usage is "codebook" of the UE have different numbers of SRS ports (for example, it may also be referred to as a second full-power transmission mode). A UE operating in mode 2 may also use a portion of antenna ports instead of all antenna ports for full-power transmission.

[0072] UEs operating in mode 2 may also transmit PUSCH and SRS in the same way regardless of whether antenna virtualization is used. For mode 2 UEs, in order to support SRS resources for more than one port, a set of TPMIs for full power transmission may also be notified. In mode 2, 2 or 3 SRS resources may also be set for one SRS resource set (a maximum of 2 in Rel.15NR).

[0073] Compared with Mode 2, Mode 1 has the advantage that the size of the required SRI field is smaller and better (full power transmission can be performed with one SRS resource).

[0074] Compared with mode 1, mode 2 has the advantage of being able to dynamically switch single-port transmission and multi-port transmission through DCI. In addition, since full-power transmission can be performed through a part of the antenna ports, it is possible to perform full-power transmission using only antennas with full-rated PAs, or using only coherent antennas.

[0075] In addition, the UE may also determine the mode for PUSCH transmission based on high-layer signaling (e.g., RRC signaling), physical layer signaling (e.g., DCI), or a combination thereof. In other words, the UE may also be set or indicated the mode for PUSCH transmission through UL full power transmission mode information (ULFPTxModes) in high-layer parameters (e.g., PUSCH setting information (PUSCH-Config information element)).

[0076] In Rel.16NR, the following is being studied: UE reporting UE capability information indicating support for mode 1, or reporting UE capability information indicating support for mode 2, or reporting UE capability information related to a TPMI set (also referred to as a TPMI group) that can perform full-power transmission in association with mode 2 (for example, also referred to as TPMI group capability information).

[0077] In addition, regarding Mode 2, the case of using the codebook of Rel.15NR and a codebook subset is being studied.

[0078] Figure 3A as well as Figure 3B This is a diagram showing an example of the TPMI group. Figure 3A The precoding matrix (precoder) of each rank corresponding to the TPMI group when the number of transmit antenna ports is 4 is shown. In this example, the precoder capable of full-power transmission for a certain rank corresponds to one or more precoders in a range separated by at least one of a colon ":" and a semicolon ";". In addition, when the precoder capable of full-power transmission for a certain rank has multiple precoders surrounded by "{}", the multiple precoders are all capable of full-power transmission for the rank. The number of columns in each matrix can also represent the number of layers.

[0079] Figure 3B An example of a TPMI group of a UE with four transmit antenna ports is shown. In this example, a non-coherent UE with four transmit antenna ports can correspond to any one of G0-G3. A partially coherent UE with four transmit antenna ports can correspond to any one of G0-G6.

[0080] When the codebook subset included in the PUSCH setting information is non-coherent or partially coherent (RRC parameter "codebookSubset" = "nonCoherent" or "partialAndNonCoherent"), and the PUSCH setting information includes a parameter indicating full power transmission ("ULFPTx"), the UE may also scale (e.g., multiply or divide) the linear value of the PUSCH transmission power determined based on the path loss, etc., according to a certain coefficient s. This coefficient may also be referred to as a power scaling factor.

[0081] For example, when the UL full power transmission mode information (ULFPTxModes) is set to mode 1, and each SRS resource of the SRS resource set used for the codebook has more than one SRS port, the UE can also derive s = (the number of non-zero PUSCH antenna ports (non-zero PUSCH antenna ports) / the maximum number of SRS ports supported by the UE in one SRS resource).

[0082] Here, the non-zero PUSCH antenna port may refer to an antenna port having non-zero PUSCH transmission power, or an antenna port whose value is not zero (eg, 1, j) among the antenna ports represented for transmission by the precoding matrix (codebook subset).

[0083] A UE to which UL full power transmission mode information (ULFPTxModes)=Mode 2 is set (also referred to as Mode 2 UE) may apply s=1 to the TPMI precoder reported as the above-mentioned TPMI group.

[0084] For TPMI precoders other than the TPMI precoder reported as the above TPMI group, the mode 2 UE may also be derived as s = (number of non-zero PUSCH antenna ports / number of SRS ports). Here, in the case where only one SRS resource is set in the SRS resource set for the purpose of the codebook, the number of SRS ports may also be the number of SRS ports associated with the SRS resource, and in the case where more than one SRS resource is set in the SRS resource set for the purpose of the codebook, the number of SRS ports may also be equivalent to the number of SRS ports of the SRS resource represented by the SRI.

[0085] The UE may also equally divide the value obtained by scaling the linear value of the PUSCH transmit power using the coefficient s across the non-zero PUSCH antenna ports. The UE may also apply the determined (or assumed) coefficient s to the precoding matrix to transmit the PUSCH at full power. In other words, the UE may also use a matrix obtained by multiplying the matrix portion of the precoding matrix by s (or √s) to transmit the PUSCH at full power.

[0086] As described above, mode 2 requires the UE to report the TPMI group that supports UL full power transmission. However, no research has been conducted on what TPMI group the UE should report (for example, whether only the above-mentioned G0-G6 is sufficient). If the appropriate TPMI group is not reported, the UE cannot properly perform full power transmission. If full power transmission is not possible, there is a concern that the increase in communication throughput will be suppressed, etc., resulting in a reduction in coverage.

[0087] Therefore, the inventors of the present invention analyzed the PA structure corresponding to the UE capability and came up with a set of groups suitable for reporting. According to one method of the present disclosure, for example, the TPMI group capability information of the entire PA structure of a partially coherent UE to which UE capability 3 can be applied can be utilized. In addition, by reducing the number of TPMI groups (or groups of groups) to be reported, efficient capability information can be utilized. In addition, the UE can perform UL MIMO (Multi Input Multi Output) transmission at full power and can maintain the same cell coverage as a single antenna. In addition, according to UL MIMO, spatial diversity gain can be obtained, and throughput improvement can be expected.

[0088] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The wireless communication methods according to the embodiments may be applied individually or in combination.

[0089] In addition, the “antenna” and “antenna port” in the following embodiments may be interchangeable.

[0090] In the present disclosure, "full power" may also be replaced by "power boost", "maximum power", "extended power", "power higher than Rel.15UE", etc.

[0091] Furthermore, in the present disclosure, having UE capability X (X=1, 2, 3) may be interchanged with reporting UE capability X, using a structure of UE capability X to perform full power transmission, and the like.

[0092] In the present disclosure, having a capability related to coherence (e.g., full coherence, partial coherence, incoherence) may also be interchanged with reporting the capability, having the coherence set, and the like.

[0093] In addition, non-coherent UE, partially coherent UE, and fully coherent UE may also be replaced with UE having capabilities related to non-coherence, UE having capabilities related to partial coherence, and UE having capabilities related to full coherence, respectively.

[0094] In addition, non-coherent UE, partially coherent UE, and fully coherent UE may also refer to UEs for which codebook subsets of "non-coherent", "partial and non-coherent", and "fully and partial and non-coherent" are set by higher layers, respectively. In addition, in the present disclosure, codebook subsets and codebooks may also be interchangeable.

[0095] Non-coherent UE, partially coherent UE, and fully coherent UE may also refer to UEs that can use a non-coherent codebook, a partially coherent codebook, and a fully coherent codebook for transmission, respectively.

[0096] In the following embodiments, mode 1 or 2 is described as being related to an SRS resource set for codebook use, but the present invention is not limited thereto. Mode 1 or 2 in each embodiment may be replaced by mode 1 or 2 for an SRS resource set for non-codebook use, for example.

[0097] In addition, in the present disclosure, "matrix of TPMI=X", "TPMI=X" and "TPMI index=X" may also be interchangeable. In addition, non-coherent codebooks and partially coherent codebooks may also be referred to as antenna selection precoders. Fully coherent codebooks may also be referred to as non-antenna selection precoders. TPMI corresponding to antenna selection precoders may also be referred to as antenna selection TPMIs. TPMI corresponding to non-antenna selection precoders may also be referred to as non-antenna selection TPMIs.

[0098] In the present disclosure, "TPMI precoder", "TPMI group", "one or more TPMIs", "TPMI group activating full power", "TPMI group supporting full power" and the like may be used interchangeably.

[0099] In the present disclosure, "supporting...", "reporting the ability to..." to the network, etc. may also be used interchangeably.

[0100] In the present disclosure, capability information indicating support for mode X (X is an integer. For example, X=0, 1, 2) may also be referred to as mode X capability information. In addition, "capability information" in the present disclosure may also be simply replaced with "information".

[0101] Regarding the "UE" in the following embodiments, it is assumed that the UE has UE capability 3, but it is not limited to this. For example, the UE may also be a UE with UE capability 2. In addition, in the following embodiments, an example of four transmit antenna ports is shown, but the number of transmit antenna ports may also be replaced by another number.

[0102] (Wireless Communication Method)

[0103] <First embodiment>

[0104] The first embodiment relates to TPMI group capability information of a partially coherent UE supporting Mode 2 and having four transmit antenna ports (4Tx).

[0105] The UE of the first embodiment has two coherent port pairs. Alternatively, one may be a pair of ports 0 and 2, and the other may be a pair of ports 1 and 3. In addition, ports 0, 1, 2, and 3 are merely port numbers for the sake of convenience of explanation, and may also be equivalent to any port numbers. A coherent port pair may also be interchangeable with a coherent subset, a coherent port set, and the like.

[0106] It can also be assumed that the ports included in a certain coherent port pair are coherent with each other. It can also be assumed that the ports included in a certain coherent port pair are irrelevant to the ports included in other coherent port pairs.

[0107] The UE of the first embodiment can switch antenna ports between any port pairs regardless of the coherent port pairs. For example, the UE can switch port 0 to any one of ports 0, 1, 2, and 3. The UE can also report capability information indicating support for antenna port switching between any port pairs to the network.

[0108] The UE may also assume that the TPMI group capability information indicates any one or a combination of the groups (G0-G6) discussed so far for Rel.16 NR.

[0109] Figure 4 This is a diagram showing an example of a TPMI group represented by TPMI group capability information in the first embodiment. In this example, the correspondence between the value of the 4-bit TPMI group capability information (the "Bit field mapped to index" in the figure) that can be reported by a partially coherent UE with four transmit antenna ports (4Tx) and the corresponding group is shown.

[0110] exist Figure 4 In the example, the bit field values ​​0-6 correspond to one group (G0-G6). On the other hand, the bit field values ​​7-14 correspond to a combination of two groups. In addition, the bit field value 15 is reserved ("Reserved"), but is not limited to this.

[0111] Figure 5 1 is a diagram showing an example of a PA structure of a partially coherent UE corresponding to each group or combination of groups in the first embodiment. In this example, the maximum output power of the PA corresponding to antenna ports 0, 1, 2, and 3 from the top is shown for each example. In addition, antenna ports 0 and 2 may also correspond to coherent subsets (for example, panels having a coherent relationship with each other). In addition, antenna ports 1 and 3 may also correspond to other coherent subsets.

[0112] G0-G6 represent the following PA structures respectively.

[0113] G0: Port 0 is 23dBm,

[0114] G1: Ports 0 and 2 are 23dBm,

[0115] G2: Ports 0, 1, and 2 are 23dBm,

[0116] G3: Ports 0, 1, and 2 are 20dBm,

[0117] G4: Ports 0 and 2 are 20dBm,

[0118] G5: Ports 0, 1, and 2 are 20dBm,

[0119] G6: Ports 0, 1, 2, and 3 are 20 dBm.

[0120] in addition, Figure 5 The "X" in can mean a combination of ports that are not conceived to be used for full-power transmission, or a case where it is less than other values ​​in the same matrix (for example, 0). The UE can also use ports that are not "X" in a certain matrix to apply full-power transmission. In addition, G3 and G5 can also represent the same PA structure (with different ranks that can be applied). "X" can also be replaced with "17".

[0121] Regarding G0-G2, the UE may also assume that the port corresponding to "23" can transmit at full power by itself. Regarding G3-G6, the UE may also assume that two or more ports corresponding to "20" can transmit at full power.

[0122] In addition, when the partially coherent UE reports only G1, it can also be assumed that the UE does not support full-power transmission using both ports 0 and 2 for single-layer transmission.

[0123] Regarding G1, the UE can assume that ports 0 and 2 are mutually correlated and have a power of 23 dBm, or that ports 0 and 1 are mutually uncorrelated and have a power of 23 dBm. Based on such assumptions, it is effective to intentionally define G1 and G4 independently.

[0124] The UE may also assume that the UE that reports only G3 does not support full power transmission of a single layer. Based on such an assumption, it is effective to specifically define G3 and G5 independently.

[0125] The combination of a plurality of groups represents the following PA structures.

[0126] G0, G4: Port 0 is 23dBm, Port 2 is 20dBm,

[0127] G1, G4: Ports 0 and 2 are 23dBm,

[0128] G2, G4: Ports 0, 1, 2 are 23dBm,

[0129] G0, G5: port 0 is 23dBm, ports 1 and 2 are 20dBm,

[0130] G1, G5: Ports 0 and 2 are 23dBm, Port 1 is 20dBm,

[0131] G2, G5: Ports 0, 1, and 2 are 23dBm,

[0132] G0, G6: port 0 is 23dBm, ports 1, 2, 3 are 20dBm,

[0133] G1, G6: Ports 0 and 2 are 23dBm, ports 1 and 3 are 20dBm,

[0134] G2, G6: Ports 0, 1, 2 are 23dBm, port 1 is 20dBm.

[0135] At first glance, the group of G1 and G4 is the same as G1, but as described above, in the case of only G1, it is assumed that ports 0 and 1 are unrelated to each other and are 23dBm, and the group of G1 and G4 is assumed that ports 0 and 2 are related to each other and are 23dBm. Based on such an assumption, it is effective to deliberately define the group of G1 and G4 independently from G1 (or G4).

[0136] In addition, the group of G2 and G4 and the group of G2 and G5 represent the same PA structure. Figure 4 In the example, any one of these groups can be shown, so an example in which the group of G2 and G4 corresponds to the index value 13 is shown, but this can also be replaced by the group of G2 and G5.

[0137] In addition, the numbers "23", "20", and "17" in the present disclosure are values ​​that take into account the output power of a power level 3 UE, and are not limited to these. "23" may also be replaced by a first power value (e.g., the maximum output power of a UE of a certain power level), and "20" may also be replaced by a second power value (e.g., the value of the maximum output power - 3 [dBm]). "17" may also be replaced by a third power value (e.g., the value of the second power value - 3 [dBm]).

[0138] [PA structure corresponding to the reported group or group of groups]

[0139] Figure 6This is a diagram showing an example of a PA structure corresponding to a reported group or group of groups in the first embodiment. In this example, considering all UE capabilities 1-3, an example of a structure in which each PA corresponding to four transmission ports can take three output powers (23dBm, 20dBm, 17dBm) is shown.

[0140] The leftmost column is an index used to associate the PA structure and the TPMI group for the sake of convenience. In this example, there are three output powers for the four PAs, so the index value that can be taken is 3. 4 =81.

[0141] Index #1-#64 is equivalent to a PA structure that includes one or more and less than three UE capability 3 of 23dBm. Index #65-#75 is equivalent to a PA structure that does not include UE capability 2 of 23dBm. Index #76 is equivalent to a PA structure that includes only UE capability 1 of 23dBm. Index #77-#81 is equivalent to a PA structure that cannot transmit at full power in an incoherent or partially coherent precoder.

[0142] Mode 2, which requires reporting of the TPMI group, corresponds to UE capability 2 or 3. Therefore, the UE may also be considered not to need to report the same Figure 6 The indices #76-#81 correspond to the TPMI groups of the PA structures.

[0143] Figure 6 The column "PA architecture" shows the PA structure. The PA structure may also show the output voltage of the PA corresponding to ports 0, 1, 2, and 3 from the left. In addition, the UE may also interpret the association between the PA structure and the antenna ports in reverse order. For example, the UE may also interpret [20 20 20 23] as [23 20 20 20] read from the right. In other words, a certain PA structure is equivalent to a structure in which ports 1 and 4 are swapped and ports 2 and 3 are swapped.

[0144] Figure 6 The "Current TPMI groups" column shows the Figure 3B The group monomer shown represents a group of PA structures. A PA structure of "GX w / switching" means that a PA structure of a group GX (X is an integer) is represented by switching an arbitrary port.

[0145] For example, the PA structure [17 23 17 17] of #16 can be realized by switching ports #0 and #1 of the PA structure ([23 17 1717] of #15) of group G0.

[0146] Figure 6The "New TPMI groups" column shows the Figure 5 The combination of the plurality of groups shown represents a group of PA configurations. The PA configuration of "GX and GY w / switching" means that the PA configuration of a group of groups GX and GY (X and Y are integers) is represented by switching any port.

[0147] like Figure 6 As shown, for partially coherent UEs with four transmit antenna ports, the PA structure of UE capability 3 does not need to be able to express Figure 4 For example, the TPMI group corresponding to the PA configuration of the UE capability 3 can be expressed without using individual G3, G4, G5, and G6.

[0148] Therefore, the UE can also be considered as Figure 4 The bit value corresponding to the unused group in indicates "reserved" or other used groups. Figure 7 FIG. 1 is a diagram showing another example of a TPMI group represented by TPMI group capability information in the first embodiment. In the correspondence relationship of this example, Figure 4 G3-G6, {G1, G4}, {G2, G4}, and {G2, G5} are excluded, indicating that the number of "reserved" indices increases to 7. Some of them can also be excluded. Figure 7 In that way, it is also conceivable that a UE with UE capability 3 does not report only the group equivalent to UE capability 2 (in other words, only reports the group equivalent to UE capability 3).

[0149] In addition, in the present disclosure, the index indicating "reserved" may indicate other groups or groups of groups not shown in the figure, or may indicate at least one of a group (or the group) that can transmit at a specific power, a group (or the group) that can perform a specific type of transmission, etc. In addition, the index indicating "reserved" may be used to indicate information other than the group (for example, information indicating between which ports antenna switching can be performed) in addition to or instead of the information indicating the group.

[0150] In addition, for UEs with UE capability 2, Figure 7 The correspondence relationship can also be modified to be able to specify at least one of G3-G6.

[0151] According to the first embodiment described above, the UE can determine and report detailed PA configuration information using the TPMI group capability information.

[0152] <Second embodiment>

[0153] The second embodiment is the same as the first embodiment, and relates to TPMI group capability information of a partially coherent UE supporting mode 2 and having four transmit antenna ports (4Tx). The same points as the first embodiment will not be repeated.

[0154] The UE of the second embodiment can perform antenna port switching only between port pairs included in the coherent port pair. For example, the UE can switch port 0 only with ports 0 and 2 that constitute the same coherent port pair, but cannot switch with ports 1 and 3 that belong to different coherent port pairs. The UE can also report capability information indicating support for antenna port switching between port pairs included in the coherent port pair to the network.

[0155] Assuming the antenna port switching of the second embodiment, it is preferable to define a new group (referred to as G7) different from G0 to G6 as the TPMI group. Fig. 8A as well as Figure 8B This is a diagram showing an example of a port and PA configuration that are capable of full-power transmission and are associated with G7.

[0156] Fig. 8A The precoding matrix of each rank corresponding to G7 when the number of transmit antenna ports is 4 (ports capable of full-power transmission) is shown. G7 can also be equivalent to the TPMI group for UL full-power transmission of ranks 1 and 2. Fig. 8A , it is shown that a UE supporting G7 can only perform full-power transmission through port 0 for rank 1 and can use ports 1 and 2 for full-power transmission for rank 2.

[0157] Figure 8B The PA structure corresponding to G7 is shown. Fig. 8A It can be seen that the output power of each PA can also be 23dBm for port 0 and X for port 1. i (X i =23 or 20)dBm, ports 2 and 3 represent 17dBm.

[0158] The UE may also assume that the TPMI group capability information indicates any one of G0-G7 or a combination thereof. In addition, the UE may also assume that G7 is not combined with other groups (for example, the group corresponding to {G0, G7} is not reported).

[0159] Fig. 9 This is a diagram showing an example of a TPMI group indicated by TPMI group capability information in the second embodiment.

[0160] exist Fig. 9In the example, the values ​​of the bit field are 0 to 7, which correspond to one group (G0 to G7). On the other hand, the values ​​of the bit field are 7 to 15, which correspond to a combination of two groups.

[0161] [PA structure corresponding to the reported group or group of groups]

[0162] Fig.10 is a diagram showing an example of a PA structure corresponding to a group or a group of groups reported in the second embodiment. Figure 6 Same as in Figure 6 The same points as those described in the description will not be described repeatedly.

[0163] Since it was imported into group G7, Fig.10 Equivalent to Figure 6 The result of replacing G1, {G0, G4}, etc. with G7. According to the corresponding relationship in this example, there is, for example, Figure 6 The advantages include that the number of indices corresponding to {G0, G4} that exist in large numbers is reduced, and the PA structure corresponding to the group reported by the UE is more easily identified. For example, the base station can assume the PA structure corresponding to the reported TPMI group and can appropriately schedule the UE.

[0164] In addition, for indexes #70, #72, #74, and #75, the PA structure is marked with an abolition line, and the corresponding group is not shown. This is equivalent to deleting the PA structure that cannot perform full-power transmission (the PA cannot output 23dBm only through the port in the coherent port pair) from the report object based on the fact that only antenna port switching between port pairs included in the coherent port pair is supported in the second embodiment.

[0165] UE can also be considered as Fig. 9 The bit value corresponding to the unused group in indicates "reserved" or other used groups. Fig.11 FIG. 1 is a diagram showing another example of a TPMI group represented by TPMI group capability information in the second embodiment. In the correspondence relationship of this example, Figure 4 G3-G6, {G1, G4}, {G2, G4}, and {G2, G5} are excluded, indicating that the number of "reserved" indexes increases to 6. In addition, some of them can also be excluded. Fig.11 In that case, a UE with UE capability 3 can also be assumed to not report to a group equivalent only to UE capability 2.

[0166] For UEs with UE capability 2, Fig.11 The correspondence relationship can also be modified to be able to specify at least one of G3-G6.

[0167] According to the second embodiment described above, the UE can determine and report the detailed PA configuration information using the TPMI group capability information.

[0168] <Other>

[0169] Furthermore, in each of the above-mentioned embodiments, the UL transmission using the antenna port is described assuming the PUSCH, but in addition to or instead of the PUSCH, full power transmission of at least one of other signals and channels may be controlled.

[0170] That is to say, the antenna port in each of the above-mentioned embodiments may be at least one antenna port of PUSCH (and the demodulation reference signal (DeModulation Reference Signal (DMRS)) for PUSCH, phase tracking reference signal (Phase Tracking Reference Signal (PTRS))), uplink control channel (physical uplink control channel (Physical Uplink Control Channel (PUCCH))), random access channel (physical random access channel (Physical Random Access Channel (PRACH))), SRS, etc., and full-power transmission may also be applied to at least one of these signals and channels.

[0171] The UE may also determine which TPMI group capability information of the first embodiment or the second embodiment to use (for example, the first embodiment if reported) based on whether the UE has the capability to support antenna port switching between any port pairs (or whether the capability information is reported).

[0172] The UE may also determine which TPMI group capability information of the first embodiment or the second embodiment to use (for example, the second embodiment if reported) based on whether it has the capability to support antenna port switching between port pairs included in the coherent port pair (or whether information on this capability is reported).

[0173] In addition, according to the first embodiment, the second embodiment, etc. described above, for a partially coherent UE with four transmit antenna ports having UE capability 3 and operating in mode 2, all TPMI groups for implementing UL full power transmission can be identified. In addition, for a partially coherent UE with four transmit antenna ports having UE capability 3 and operating in mode 2, only the TPMI groups required for implementing UL full power transmission can be identified. In addition, the TPMI groups for implementing UL full power transmission of ranks 1, 2, 3, and 4 can be identified.

[0174] The TPMI group information may also be equivalent to information indicating ports capable of full power transmission only for a certain rank (e.g., rank 1, 2, 3, or 4). In this case, the UE and the base station may also identify ports capable of full power transmission for a higher rank based on the TPMI group information. For example, Figure 3A As shown, when G3 is defined as representing a structure corresponding to rank 2 (a matrix of 4 rows and 2 columns), the UE and the base station can also determine that: the UE reporting G3 uses ports 0, 1 and 2 that are capable of full-power transmission represented by these structures, and can perform full-power transmission with rank 3 (a matrix of 4 rows and 3 columns).

[0175] The UE and the base station may also decide to support UL full power transmission for a non-coherent or partially coherent TPMI group for a larger rank (eg, rank 3) based on the non-coherent TPMI group (G0-G3) for a smaller rank (eg, rank 2).

[0176] The UE and the base station may also decide to support UL full power transmission of the partially coherent TPMI group based on the non-coherent TPMI group of rank 1.

[0177] (Wireless Communication System)

[0178] Hereinafter, a configuration of a wireless communication system according to an embodiment of the present disclosure will be described. In the wireless communication system, communication is performed using any one of the wireless communication methods according to the above-mentioned embodiments of the present disclosure or a combination thereof.

[0179] Fig.12 1 is a diagram showing an example of a schematic structure of a wireless communication system involved in one embodiment. The wireless communication system 1 may also be a system that implements communication using Long Term Evolution (LTE) standardized by the Third Generation Partnership Project (3GPP), the fifth generation mobile communication system New Radio (5G NR), and the like.

[0180] In addition, the wireless communication system 1 can also support dual connectivity (Multi-RAT Dual Connectivity (MR-DC)) between multiple radio access technologies (Radio Access Technology (RAT)). MR-DC can also include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA))) and NR (E-UTRA-NR Dual Connectivity (E-UTRA-NR Dual Connectivity (EN-DC))), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NR-E-UTRA Dual Connectivity (NE-DC))), etc.

[0181] In EN-DC, the base station (eNB) of LTE (E-UTRA) is the master node (Master Node (MN)), and the base station (gNB) of NR is the secondary node (Secondary Node (SN)). In NE-DC, the base station (gNB) of NR is the MN, and the base station (eNB) of LTE (E-UTRA) is the SN.

[0182] The wireless communication system 1 can also support dual connectivity between multiple base stations within the same RAT (for example, dual connectivity (NR-NR Dual Connectivity (NN-DC)) where both MN and SN are NR base stations (gNB)).

[0183] The wireless communication system 1 may also include a base station 11 that forms a macro cell C1 with a relatively wide coverage, and a base station 12 (12a-12c) that is configured in the macro cell C1 and forms a small cell C2 that is narrower than the macro cell C1. The user terminal 20 may also be located in at least one cell. The configuration and number of each cell and user terminal 20 are not limited to the method shown in the figure. Hereinafter, when the base stations 11 and 12 are not distinguished, they are collectively referred to as base stations 10.

[0184] The user terminal 20 may be connected to at least one of the plurality of base stations 10. The user terminal 20 may use at least one of carrier aggregation (CA) using a plurality of component carriers (CC) and dual connectivity (DC).

[0185] Each CC may also be included in at least one of the first frequency band (Frequency Range 1 (FR1)) and the second frequency band (Frequency Range 2 (FR2)). The macro cell C1 may also be included in FR1, and the small cell C2 may also be included in FR2. For example, FR1 may be a frequency band below 6 GHz (below 6 GHz (sub-6 GHz)), and FR2 may be a frequency band higher than 24 GHz (above-24 GHz). In addition, the frequency bands and definitions of FR1 and FR2 are not limited to these. For example, FR1 may also be equivalent to a frequency band higher than FR2.

[0186] Furthermore, the user terminal 20 may perform communication in each CC using at least one of time division duplex (TDD) and frequency division duplex (FDD).

[0187] Multiple base stations 10 may also be connected via wired (e.g., optical fiber based on Common Public Radio Interface (CPRI)), X2 interface, etc.) or wireless (e.g., NR communication). For example, when NR communication between base stations 11 and 12 is used as a backhaul, the base station 11 equivalent to the upper station may also be referred to as an Integrated Access Backhaul (IAB) donor, and the base station 12 equivalent to a relay station (relay) may also be referred to as an IAB node.

[0188] The base station 10 may also be connected to the core network 30 via other base stations 10 or directly. The core network 30 may also include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), a Next Generation Core (NGC), and the like.

[0189] The user terminal 20 may also be a terminal that supports at least one of communication modes such as LTE, LTE-A, and 5G.

[0190] In the wireless communication system 1, a wireless access method based on orthogonal frequency division multiplexing (OFDM) may be used. For example, in at least one of the downlink (DL) and the uplink (UL), cyclic prefix OFDM (CP-OFDM), discrete Fourier transform spread OFDM (DFT-s-OFDM), orthogonal frequency division multiple access (OFDMA), single carrier frequency division multiple access (SC-FDMA), etc. may be used.

[0191] The radio access scheme may also be referred to as a waveform. In addition, in the wireless communication system 1, other radio access schemes (for example, other single-carrier transmission schemes, other multi-carrier transmission schemes) may be used as the radio access schemes for UL and DL.

[0192] As downlink channels, the wireless communication system 1 may use a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared by each user terminal 20, a broadcast channel (Physical Broadcast Channel (PBCH))), a downlink control channel (Physical Downlink Control Channel (PDCCH)), etc.

[0193] In addition, as uplink channels, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20), an uplink control channel (Physical Uplink Control Channel (PUCCH))), a random access channel (Physical Random Access Channel (PRACH)) and the like can also be used in the wireless communication system 1.

[0194] User data, high-layer control information, system information block (SIB), etc. are transmitted through PDSCH. User data, high-layer control information, etc. can also be transmitted through PUSCH. In addition, master information block (MIB) can also be transmitted through PBCH.

[0195] The lower layer control information may also be transmitted via the PDCCH. The lower layer control information may include, for example, downlink control information (Downlink Control Information (DCI)) including scheduling information of at least one of the PDSCH and the PUSCH.

[0196] In addition, the DCI for scheduling the PDSCH may also be referred to as DL allocation, DL DCI, etc., and the DCI for scheduling the PUSCH may also be referred to as UL grant, UL DCI, etc. In addition, the PDSCH may also be replaced by DL data, and the PUSCH may also be replaced by UL data.

[0197] In the detection of PDCCH, the control resource set (CORESET) and the search space can also be used. CORESET corresponds to the resources for searching DCI. The search space corresponds to the search area and search method of PDCCH candidates. A CORESET can also be associated with one or more search spaces. The UE can also monitor the CORESET associated with a search space based on the search space setting.

[0198] A search space may also correspond to a PDCCH candidate corresponding to one or more aggregation levels. One or more search spaces may also be referred to as a search space set. In addition, the "search space", "search space set", "search space setting", "search space set setting", "CORESET", "CORESET setting" and the like in the present disclosure may also be interchangeable.

[0199] Uplink control information (uplink control information (UCI)) including at least one of channel state information (CSI), delivery confirmation information (e.g., also known as hybrid automatic repeat request confirmation (HARQ-ACK), ACK / NACK, etc.), and scheduling request (SR) can also be transmitted through PUCCH. The random access preamble used to establish a connection with a cell can also be transmitted through PRACH.

[0200] In the present disclosure, downlink, uplink, etc. may be expressed without the word “link.” In addition, various channels may be expressed without the word “physical” at the beginning.

[0201] In the wireless communication system 1, a synchronization signal (Synchronization Signal (SS)), a downlink reference signal (Downlink Reference Signal (DL-RS)), etc. can also be transmitted. As DL-RS, in the wireless communication system 1, a cell-specific reference signal (Cell-specific Reference Signal (CRS)), a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), a demodulation reference signal (DeModulation Reference Signal (DMRS)), a positioning reference signal (Positioning Reference Signal (PRS)), a phase tracking reference signal (Phase Tracking Reference Signal (PTRS)), etc. can also be transmitted.

[0202] The synchronization signal may be, for example, at least one of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). A signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) may also be referred to as SS / PBCH block, SS block (SSB), etc. In addition, SS, SSB, etc. may also be referred to as reference signals.

[0203] In addition, in the wireless communication system 1, as an uplink reference signal (Uplink Reference Signal (UL-RS)), a measurement reference signal (Sounding Reference Signal (SRS)), a demodulation reference signal (DMRS), etc. can also be transmitted. In addition, DMRS can also be called a user terminal specific reference signal (UE-specific Reference Signal).

[0204] (Base Station)

[0205] Fig.13 1 is a diagram showing an example of a structure of a base station involved in one embodiment. The base station 10 includes a control unit 110, a transmitting and receiving unit 120, a transmitting and receiving antenna 130, and a transmission path interface (transmission line interface) 140. In addition, the control unit 110, the transmitting and receiving unit 120, the transmitting and receiving antenna 130, and the transmission path interface 140 may each be provided with more than one.

[0206] In addition, in this example, the functional blocks of the characteristic parts in this embodiment are mainly shown, and it is also assumed that the base station 10 also has other functional blocks required for wireless communication. Part of the processing of each unit described below may also be omitted.

[0207] The control unit 110 controls the entire base station 10. The control unit 110 can be composed of a controller, a control circuit, and the like that are described based on common knowledge in the technical field to which the present disclosure relates.

[0208] The control unit 110 may also control signal generation, scheduling (e.g., resource allocation, mapping), etc. The control unit 110 may also control transmission and reception, measurement, etc. using the transmission and reception unit 120, the transmission and reception antenna 130, and the transmission path interface 140. The control unit 110 may also generate data, control information, sequences, etc. to be sent as signals, and forward them to the transmission and reception unit 120. The control unit 110 may also perform call processing (setting, release, etc.) of communication channels, state management of the base station 10, management of wireless resources, etc.

[0209] The transmitting and receiving unit 120 may also include a baseband unit 121, a radio frequency (RF) unit 122, and a measuring unit 123. The baseband unit 121 may also include a transmitting processing unit 1211 and a receiving processing unit 1212. The transmitting and receiving unit 120 may be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter (phase shifter), a measuring circuit, a transmitting and receiving circuit, etc., which are described based on the common knowledge in the technical field involved in the present disclosure.

[0210] The transmitting and receiving unit 120 may be configured as an integrated transmitting and receiving unit, or may be configured by a transmitting unit and a receiving unit. The transmitting unit may also be configured by a transmitting processing unit 1211 and an RF unit 122. The receiving unit may also be configured by a receiving processing unit 1212, an RF unit 122, and a measuring unit 123.

[0211] The transmitting / receiving antenna 130 can be constituted by an antenna described based on common knowledge in the technical field involved in the present disclosure, such as an array antenna.

[0212] The transmitting and receiving unit 120 may also transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting and receiving unit 120 may also receive the above-mentioned uplink channel, uplink reference signal, etc.

[0213] The transmitting and receiving unit 120 may also use digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), etc. to form at least one of a transmitting beam and a receiving beam.

[0214] The sending and receiving unit 120 (sending processing unit 1211), for example, may also perform Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (for example, RLC retransmission control), Medium Access Control (MAC) layer processing (for example, HARQ retransmission control), etc. on the data and control information obtained from the control unit 110 to generate a bit string to be sent.

[0215] The transmitting and receiving unit 120 (transmitting processing unit 1211) can also perform channel coding (which may also include error correction coding), modulation, mapping, filter processing (filtering processing), discrete Fourier transform (Discrete Fourier Transform (DFT)) processing (as needed), inverse fast Fourier transform (Inverse Fast Fourier Transform (IFFT)) processing, precoding, digital-to-analog conversion and other transmission processing on the bit string to be sent, and output a baseband signal.

[0216] The transmitting and receiving unit 120 (RF unit 122 ) may also perform modulation, filter processing, amplification, etc. on the baseband signal to a radio frequency band, and transmit the signal in the radio frequency band via the transmitting and receiving antenna 130 .

[0217] On the other hand, the transmitting and receiving unit 120 (RF unit 122 ) may also perform amplification, filter processing, demodulation to a baseband signal, etc. on the signal in the radio frequency band received by the transmitting and receiving antenna 130 .

[0218] The sending and receiving unit 120 (receiving processing unit 1212) can also apply analog-to-digital conversion, fast Fourier transform (FFT) processing, inverse discrete Fourier transform (IDFT) processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal to obtain user data, etc.

[0219] The transmitting and receiving unit 120 (measuring unit 123) may also implement measurements related to the received signal. For example, the measuring unit 123 may also perform radio resource management (Radio Resource Management (RRM)) measurements, channel state information (CSI) measurements, etc. based on the received signal. The measuring unit 123 may also measure received power (e.g., reference signal received power (Reference Signal Received Power (RSRP))), received quality (e.g., reference signal received quality (Reference Signal Received Quality (RSRQ)), signal to interference plus noise ratio (Signal to Interference plus Noise Ratio (SINR)), signal to noise ratio (Signal to Noise Ratio (SNR))), signal strength (e.g., received signal strength indicator (Received Signal Strength Indicator (RSSI))), propagation path information (e.g., CSI), etc. The measurement results may also be output to the control unit 110.

[0220] The transmission path interface 140 can also send and receive signals (return signaling) between devices included in the core network 30, other base stations 10, etc., and can also obtain and transmit user data (user plane data) and control plane data for the user terminal 20.

[0221] In addition, the transmission unit and the reception unit of the base station 10 in the present disclosure may also be constituted by at least one of the transmission and reception unit 120 , the transmission and reception antenna 130 , and the transmission path interface 140 .

[0222] In addition, the transmitting and receiving unit 120 can also receive at least one of capability information indicating the supported full-power transmission mode (for example, mode 1, mode 2) and capability information (TPMI group capability information) indicating the Transmitted Precoding Matrix Indicator (TPMI) group supporting full-power transmission from the user terminal 20.

[0223] The control unit 110 may also determine the correspondence between the bit (bit value) of the TPMI group capability information and the TPMI group (or group of groups) based on whether the user terminal 20 supports antenna port switching between any antenna port pairs.

[0224] The transmitting and receiving unit 120 may also receive the TPMI group capability information corresponding to the TPMI group supporting full power transmission, which is transmitted from the user terminal 20 based on the corresponding relationship.

[0225] (User Terminal)

[0226] Fig.14 2 is a diagram showing an example of a configuration of a user terminal according to an embodiment. The user terminal 20 includes a control unit 210, a transmitting / receiving unit 220, and a transmitting / receiving antenna 230. In addition, the control unit 210, the transmitting / receiving unit 220, and the transmitting / receiving antenna 230 may each be provided with one or more.

[0227] In addition, in this example, the functional blocks of the characteristic parts in this embodiment are mainly shown, and it is also conceivable that the user terminal 20 also has other functional blocks required for wireless communication. Part of the processing of each unit described below may be omitted.

[0228] The control unit 210 controls the entire user terminal 20. The control unit 210 can be composed of a controller, a control circuit, and the like that are described based on common knowledge in the technical field to which the present disclosure relates.

[0229] The control unit 210 may also control signal generation, mapping, etc. The control unit 210 may also control transmission and reception, measurement, etc. using the transmission and reception unit 220 and the transmission and reception antenna 230. The control unit 210 may also generate data, control information, sequences, etc. to be transmitted as signals, and forward them to the transmission and reception unit 220.

[0230] The transmitting and receiving unit 220 may also include a baseband unit 221, an RF unit 222, and a measuring unit 223. The baseband unit 221 may also include a transmitting processing unit 2211 and a receiving processing unit 2212. The transmitting and receiving unit 220 may be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measuring circuit, a transmitting and receiving circuit, etc., which are described based on the common knowledge in the technical field involved in the present disclosure.

[0231] The transmitting and receiving unit 220 may be configured as an integrated transmitting and receiving unit, or may be configured as a transmitting unit and a receiving unit. The transmitting unit may also be configured as a transmitting processing unit 2211 and an RF unit 222. The receiving unit may also be configured as a receiving processing unit 2212, an RF unit 222, and a measuring unit 223.

[0232] The transmitting / receiving antenna 230 can be constituted by an antenna described based on common knowledge in the technical field involved in the present disclosure, such as an array antenna.

[0233] The transmitting and receiving unit 220 may also receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting and receiving unit 220 may also transmit the above-mentioned uplink channel, uplink reference signal, etc.

[0234] The transmitting and receiving unit 220 may also use digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), etc. to form at least one of a transmitting beam and a receiving beam.

[0235] The sending and receiving unit 220 (sending processing unit 2211) can also perform PDCP layer processing, RLC layer processing (for example, RLC retransmission control), MAC layer processing (for example, HARQ retransmission control), etc. on the data, control information, etc. obtained from the control unit 210 to generate a bit string to be sent.

[0236] The transmitting and receiving unit 220 (transmitting processing unit 2211) can also perform channel coding (which may also include error correction coding), modulation, mapping, filter processing, DFT processing (as needed), IFFT processing, precoding, digital-to-analog conversion and other transmission processing on the bit string to be sent, and output a baseband signal.

[0237] In addition, whether to apply DFT processing may also be based on the setting of transform precoding. For a certain channel (e.g., PUSCH), when transform precoding is valid (enabled), the transmitting and receiving unit 220 (transmitting processing unit 2211) may also perform DFT processing as the above-mentioned transmission processing in order to transmit the channel using a DFT-s-OFDM waveform. Otherwise, the transmitting and receiving unit 220 (transmitting processing unit 2211) may also perform DFT processing as the above-mentioned transmission processing without performing DFT processing.

[0238] The transmitting and receiving unit 220 (RF unit 222 ) may also perform modulation, filter processing, amplification, etc. on the baseband signal to a radio frequency band, and transmit the signal in the radio frequency band via the transmitting and receiving antenna 230 .

[0239] On the other hand, the transmitting and receiving unit 220 (RF unit 222 ) may perform amplification, filter processing, demodulation to a baseband signal, etc. on the signal in the radio frequency band received by the transmitting and receiving antenna 230 .

[0240] The sending and receiving unit 220 (receiving processing unit 2212) can also apply analog-to-digital conversion, FFT processing, IDFT processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the obtained baseband signal to obtain user data, etc.

[0241] The transmitting and receiving unit 220 (measuring unit 223) may also perform measurements related to the received signal. For example, the measuring unit 223 may also perform RRM measurements, CSI measurements, etc. based on the received signal. The measuring unit 223 may also measure received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc. The measurement results may also be output to the control unit 210.

[0242] In addition, the transmitting unit and the receiving unit of the user terminal 20 in the present disclosure may also be composed of at least one of the transmitting and receiving unit 220 and the transmitting and receiving antenna 230 .

[0243] In addition, the transmitting unit (transmitting and receiving unit 220) may also transmit mode 2 capability information indicating support for mode 2 of full power transmission. In addition, the mode 2 capability information may be replaced by mode 1 and 2 capability information indicating support for mode 1 and mode 2, or by mode 0 capability information indicating support for mode 0 (UE capability 1).

[0244] The control unit 210 may also determine the correspondence between the bit (bit value) of the Transmitted Precoding Matrix Indicator (TPMI) group capability information and the TPMI group (and / or group of groups) based on whether antenna port switching between any antenna port pairs is supported (for example, Figure 4 , 7 , 9, 11).

[0245] The control unit 210 may also be based on whether antenna port switching between any antenna port pairs is supported, for example, referring to Figure 6 or Fig.10 The table determines the TPMI group corresponding to the PA structure it has.

[0246] In addition, the control unit 210 may not store or use these tables themselves. The control unit 210 may perform the above-mentioned processing by any method as long as it can determine the correspondence relationship represented by these tables.

[0247] The sending unit (sending / receiving unit 220) may also send the TPMI group capability information corresponding to the TPMI group supporting full-power transmission based on the corresponding relationship.

[0248] The control unit 210 may also assume that the corresponding relationship only includes the TPMI group related to the user terminal capability 3 related to full power transmission.

[0249] The control unit 210 may also assume that the correspondence includes a TPMI group (eg, group 7), which indicates that for rank 1, full power transmission can be performed only through port 0, and for rank 2, full power transmission can be performed using ports 1 and 2.

[0250] When mode 2 is set, the transmission unit (transmission / reception unit 220) may transmit the uplink shared channel (PUSCH) at full power using a precoder based on the TPMI specified by DCI or the like.

[0251] When transmitting the mode 2 capability information and the TPMI group capability information, the transmitting unit (transmitting / receiving unit 220) may also transmit information indicating a group of a TPMI group as the TPMI group capability information.

[0252] (Hardware Structure)

[0253] In addition, the block diagram used in the description of the above-mentioned embodiment shows a block of a functional unit. These functional blocks (structural units) are implemented by any combination of at least one of hardware and software. In addition, the implementation method of each functional block is not particularly limited. That is, each functional block can be implemented by a device that is physically or logically combined, or two or more devices that are physically or logically separated can be directly or indirectly (for example, by wired, wireless, etc.) connected and implemented by these multiple devices. The functional block can also be implemented by combining the above-mentioned one device or the above-mentioned multiple devices with software.

[0254] Here, the functions include judging, deciding, determining, calculating, calculating, processing, deriving, investigating, searching, confirming, receiving, sending, outputting, accessing, solving, selecting, selecting, establishing, comparing, assuming, expecting, regarding, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but are not limited to these. For example, a functional block (structural unit) that implements a sending function may also be referred to as a transmitting unit, a transmitter, etc. Any one of them is as described above, and the implementation method is not particularly limited.

[0255] For example, a base station, a user terminal, etc. in one embodiment of the present disclosure may also function as a computer that performs processing of the wireless communication method of the present disclosure. Fig.151001, memory 1002, storage 1003, communication device 1004, input device 1005, output device 1006, bus 1007, etc.

[0256] In addition, in the present disclosure, the terms such as device, circuit, equipment, section, unit, etc. are interchangeable. The hardware structure of the base station 10 and the user terminal 20 may be configured to include one or more of the devices shown in the figure, or may be configured to exclude some of the devices.

[0257] For example, only one processor 1001 is shown, but there may be multiple processors. In addition, the processing may be performed by one processor, or may be performed by two or more processors simultaneously, sequentially, or in other ways. In addition, the processor 1001 may also be implemented by one or more chips.

[0258] The functions of the base station 10 and the user terminal 20 are realized, for example, by reading specific software (program) into hardware such as the processor 1001 and the memory 1002, so that the processor 1001 performs calculations and controls communication via the communication device 1004, or controls at least one of the reading and writing of data in the memory 1002 and the storage 1003.

[0259] The processor 1001 controls the entire computer by, for example, operating an operating system. The processor 1001 may also be composed of a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, a register, etc. For example, at least a part of the above-mentioned control unit 110 (210), the sending and receiving unit 120 (220), etc. may also be implemented by the processor 1001.

[0260] In addition, the processor 1001 reads the program (program code), software module, data, etc. from at least one of the storage 1003 and the communication device 1004 to the memory 1002, and performs various processes based on them. As a program, a program that causes a computer to perform at least a part of the operations described in the above-mentioned embodiments can be used. For example, the control unit 110 (210) can also be implemented by a control program stored in the memory 1002 and operated in the processor 1001, and the same can be implemented for other functional blocks.

[0261] The memory 1002 may also be a computer-readable recording medium, for example, composed of at least one of a read-only memory (ROM), an erasable programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM), a random access memory (RAM), or other appropriate storage media. The memory 1002 may also be referred to as a register, a cache, a main memory (main storage device), etc. The memory 1002 can store executable programs (program codes), software modules, etc. for implementing the wireless communication method involved in one embodiment of the present disclosure.

[0262] The storage 1003 may also be a computer-readable recording medium, such as a flexible disk, a floppy disk, an optical disk (such as a compact disk (Compact Disc ROM (CD-ROM)), a digital versatile disk, a Blu-ray (Blu-ray) (registered trademark) disk), a removable disk, a hard disk drive, a smart card, a flash memory device (such as a card, a stick, a key drive), a magnetic stripe, a database, a server, or at least one of other suitable storage media. The storage 1003 may also be referred to as an auxiliary storage device.

[0263] The communication device 1004 is hardware (transmitting and receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also called a network device, a network controller, a network card, a communication module, etc. In order to realize at least one of frequency division duplex (Frequency Division Duplex (FDD)) and time division duplex (Time Division Duplex (TDD)), the communication device 1004 may also be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. For example, the above-mentioned transmitting and receiving unit 120 (220), the transmitting and receiving antenna 130 (230), etc. may also be realized by the communication device 1004. The transmitting and receiving unit 120 (220) may also be realized by physically or logically separating the transmitting unit 120a (220a) and the receiving unit 120b (220b).

[0264] The input device 1005 is an input device that receives input from the outside (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.). The output device 1006 is an output device that implements output to the outside (e.g., a display, a speaker, a light emitting diode (LED) lamp, etc.). In addition, the input device 1005 and the output device 1006 may also be an integrated structure (e.g., a touch panel).

[0265] In addition, the processor 1001, the memory 1002 and other devices are connected via a bus 1007 for communicating information. The bus 1007 may be configured as a single bus or may be configured as different buses between the devices.

[0266] In addition, the base station 10 and the user terminal 20 may also be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), and a field programmable gate array (FPGA), and the hardware may be used to implement a part or all of each functional block. For example, the processor 1001 may also be implemented using at least one of these hardware.

[0267] (Variation Example)

[0268] In addition, the terms described in the present disclosure and the terms required for understanding the present disclosure may also be replaced with terms having the same or similar meanings. For example, channels, code elements, and signals (signals or signaling) may also be replaced with each other. In addition, a signal may also be a message. A reference signal may also be referred to as RS, and may also be referred to as a pilot, a pilot signal, etc. depending on the standard applied. In addition, a component carrier (CC) may also be referred to as a cell, a frequency carrier, a carrier frequency, etc.

[0269] A wireless frame may also be composed of one or more periods (frames) in the time domain. Each period (frame) of the one or more periods (frames) constituting a wireless frame may also be referred to as a subframe. Further, a subframe may also be composed of one or more time slots in the time domain. A subframe may also be a fixed time length (e.g., 1 ms) that is not dependent on a parameter set (numerology).

[0270] Here, the parameter set may also refer to a communication parameter applied in at least one of the transmission and reception of a certain signal or channel. For example, the parameter set may also represent at least one of the subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), the number of symbols per TTI, wireless frame structure, specific filtering processing performed by the transmitter and receiver in the frequency domain, specific windowing processing performed by the transmitter and receiver in the time domain, etc.

[0271] A time slot may also be composed of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.) in the time domain. In addition, a time slot may also be a time unit based on a parameter set.

[0272] A time slot may also include multiple mini-slots. Each mini-slot may also be composed of one or more symbols in the time domain. In addition, a mini-slot may also be referred to as a sub-slot. A mini-slot may also be composed of fewer symbols than a time slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a mini-slot may also be referred to as a PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a mini-slot may also be referred to as a PDSCH (PUSCH) mapping type B.

[0273] Radio frames, subframes, time slots, mini-time slots, and symbols all represent time units for transmitting signals. Radio frames, subframes, time slots, mini-time slots, and symbols may also be referred to by their respective names. In addition, time units such as frames, subframes, time slots, mini-time slots, and symbols in the present disclosure may also be interchangeable.

[0274] For example, a subframe may be referred to as a TTI, a plurality of consecutive subframes may be referred to as a TTI, and a time slot or a mini time slot may be referred to as a TTI. That is, at least one of a subframe and a TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (e.g., 1-13 symbols), or a period longer than 1 ms. In addition, the unit representing a TTI may be referred to as a time slot, a mini time slot, etc. instead of a subframe.

[0275] Here, TTI refers to, for example, the minimum time unit for scheduling in wireless communication. For example, in the LTE system, the base station schedules each user terminal to allocate wireless resources (frequency bandwidth, transmission power, etc. that can be used in each user terminal) in TTI units. In addition, the definition of TTI is not limited to this.

[0276] TTI may also be a transmission time unit for a data packet (transport block), a code block, a code word, etc. that has been channel-coded, and may also be a processing unit for scheduling, link adaptation, etc. In addition, when TTI is given, the time interval (e.g., the number of symbols) to which a transport block, a code block, a code word, etc. is actually mapped may be shorter than the TTI.

[0277] In addition, when a time slot or a mini time slot is called TTI, one or more TTIs (i.e., one or more time slots or one or more mini time slots) can also be the minimum time unit of scheduling. In addition, the number of time slots (mini time slots) constituting the minimum time unit of scheduling can also be controlled.

[0278] A TTI having a time length of 1 ms may also be referred to as a normal TTI (TTI in 3GPP Rel.8-12), a standard TTI, a long TTI, a normal subframe, a standard subframe, a long subframe, a time slot, etc. A TTI shorter than a normal TTI may also be referred to as a shortened TTI, a short TTI, a partial TTI (partial or fractional TTI), a shortened subframe, a short subframe, a mini time slot, a sub time slot, a time slot, etc.

[0279] In addition, a long TTI (e.g., normal TTI, subframe, etc.) may be replaced by a TTI having a time length exceeding 1 ms, and a short TTI (e.g., shortened TTI, etc.) may be replaced by a TTI having a TTI length shorter than that of the long TTI and longer than 1 ms.

[0280] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or more consecutive subcarriers (subcarriers) in the frequency domain. The number of subcarriers included in an RB may also be the same regardless of the parameter set, for example, 12. The number of subcarriers included in an RB may also be determined based on the parameter set.

[0281] In addition, an RB may also include one or more symbols in the time domain, and may also be the length of a slot, a mini-slot, a subframe, or a TTI. A TTI, a subframe, etc. may also be composed of one or more resource blocks, respectively.

[0282] In addition, one or more RBs may also be referred to as a physical resource block (Physical RB (PRB)), a sub-carrier group (Sub-Carrier Group (SCG)), a resource element group (Resource Element Group (REG)), a PRB pair, an RB pair, etc.

[0283] In addition, a resource block may be composed of one or more resource elements (RE). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0284] Bandwidth Part (BWP) (also referred to as partial bandwidth, etc.) may also represent a subset of contiguous common RBs (common resource blocks) for a parameter set in a carrier. Here, common RBs may also be identified by the index of the RB relative to the common reference point of the carrier. PRBs may also be defined in a BWP and numbered within the BWP.

[0285] The BWP may include a UL BWP (BWP for UL) and a DL BWP (BWP for DL). For a UE, one or more BWPs may be configured in one carrier.

[0286] At least one of the configured BWPs may be activated, and the UE may not assume that it will transmit or receive a specific signal / channel other than the activated BWP. In addition, the "cell", "carrier", etc. in the present disclosure may also be replaced by "BWP".

[0287] In addition, the above-mentioned structures such as radio frames, subframes, time slots, mini-time slots and symbols are only examples. For example, the number of subframes included in a radio frame, the number of time slots in each subframe or radio frame, the number of mini-time slots included in a time slot, the number of symbols and RBs included in a time slot or mini-time slot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, and the cyclic prefix (CP) length can be changed in various ways.

[0288] In addition, the information, parameters, etc. described in the present disclosure may be represented by absolute values, relative values ​​relative to a specific value, or other corresponding information. For example, wireless resources may also be indicated by a specific index.

[0289] In the present disclosure, the names used for parameters, etc. are not limiting in all respects. Furthermore, the mathematical formulas, etc. using these parameters may be different from those explicitly disclosed in the present disclosure. Various channels (PUCCH, PDCCH, etc.) and information elements can be identified by any suitable names, and therefore, the various names assigned to these various channels and information elements are not limiting in all respects.

[0290] Information, signals, etc. described in this disclosure may also be represented using any of a variety of different techniques. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be mentioned throughout the above description may also be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination thereof.

[0291] Furthermore, information, signals, etc. can be output in at least one of the following directions: from a higher layer (upper layer) to a lower layer (lower layer), and from a lower layer to a higher layer. Information, signals, etc. can also be input and output via multiple network nodes.

[0292] The input and output information, signals, etc. may be stored in a specific location (e.g., a memory), or may be managed using a management table. The input and output information, signals, etc. may be overwritten, updated, or appended. The output information, signals, etc. may also be deleted. The input information, signals, etc. may also be sent to other devices.

[0293] The notification of information is not limited to the methods / implementations described in the present disclosure, and may also be performed by other methods. For example, the notification of information in the present disclosure may also be implemented through physical layer signaling (e.g., downlink control information (Downlink Control Information (DCI))), uplink control information (Uplink Control Information (UCI))), high-layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB)), System Information Block (SIB)), etc.), Medium Access Control (MAC) signaling), other signals or a combination thereof.

[0294] In addition, physical layer signaling may also be referred to as layer 1 / layer 2 (Layer 1 / Layer 2 (L1 / L2)) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. In addition, RRC signaling may also be referred to as an RRC message, such as an RRC connection establishment (RRC Connection Setup) message, an RRC connection reconstruction (RRC Connection Reconfiguration) message, etc. In addition, MAC signaling may also be notified using, for example, a MAC control element (MACControl Element (CE)).

[0295] Furthermore, notification of specific information (eg, notification of “it is X”) is not limited to explicit notification, but may be performed implicitly (eg, by not notifying the specific information or by notifying other information).

[0296] The determination can be made by a value represented by a bit (0 or 1), by a true or false value (Boolean value) represented by true or false, or by comparison of numerical values ​​(for example, comparison with a specific value).

[0297] Whether software is called software, firmware, middle-ware, microcode, hardware description language, or other names, it should be broadly interpreted as meaning instructions, instruction sets, code, code segments, program code, program, sub-program, software modules, applications, software applications, software packages, routines, sub-routines, objects, executable files, execution threads, procedures, functions, etc.

[0298] In addition, software, instructions, information, etc. may also be sent and received via a transmission medium. For example, when software is sent from a website, server, or other remote source using at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and wireless technology (infrared, microwave, etc.), at least one of these wired technology and wireless technology is included in the definition of transmission medium.

[0299] The terms "system" and "network" used in the present disclosure can be used interchangeably. "Network" may also refer to a device (eg, a base station) included in the network.

[0300] In the present disclosure, terms such as "precoding", "precoder", "weight (precoding weight)", "Quasi-Co-Location (QCL)", "Transmission Configuration Indication state (TCI state)", "spatial relation", "spatial domain filter", "transmission power", "phase rotation", "antenna port", "antenna port group", "layer", "number of layers", "rank", "resource", "resource set", "resource group", "beam", "beam width", "beam angle", "antenna", "antenna element", and "panel" can be used interchangeably.

[0301] In the present disclosure, terms such as "Base Station (BS)", "wireless base station", "fixed station", "NodeB", "eNB (eNodeB)", "gNB (gNodeB)", "access point", "Transmission Point (TP)", "Reception Point (RP)", "Transmission / Reception Point (TRP)", "panel", "cell", "sector", "cell group", "carrier", and "component carrier" can be used interchangeably. There are also cases where base stations are referred to by terms such as macro cell, small cell, micro-micro cell, and micro-micro cell.

[0302] A base station can accommodate one or more (for example, three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be divided into multiple smaller areas, and each smaller area can also provide communication services through a base station subsystem (for example, a small base station for indoor use (Remote Radio Head (RRH))). Terms such as "cell" or "sector" refer to a part or the entirety of the coverage area of ​​at least one of a base station and a base station subsystem that provides communication services within the coverage area.

[0303] In the present disclosure, terms such as “mobile station (MS)”, “user terminal”, “user device (User Equipment (UE))”, and “terminal” can be used interchangeably.

[0304] There are also cases where a mobile station is referred to as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, hand set, user agent, mobile client, client or some other appropriate terminology.

[0305] At least one of the base station and the mobile station may also be referred to as a transmitting device, a receiving device, a wireless communication device, etc. In addition, at least one of the base station and the mobile station may also be a device carried in a mobile body, a mobile body, etc. The mobile body may be a means of transportation (e.g., a vehicle, an airplane, etc.), a mobile body that moves in an unmanned manner (e.g., a drone, an autonomous driving vehicle, etc.), or a robot (manned or unmanned). In addition, at least one of the base station and the mobile station also includes a device that does not necessarily move when performing a communication operation. For example, at least one of the base station and the mobile station may also be an Internet of Things (IoT) device such as a sensor.

[0306] In addition, the base station in the present disclosure may also be replaced by a user terminal. For example, the various methods / implementations of the present disclosure may also be applied to a structure in which the communication between a base station and a user terminal is replaced by the communication between multiple user terminals (for example, it may also be referred to as device-to-device (D2D)), vehicle-to-everything (V2X), etc.). In this case, it may also be set as a structure in which the user terminal 20 has the functions possessed by the above-mentioned base station 10. In addition, terms such as "uplink" and "downlink" may also be replaced by terms corresponding to communication between terminals (for example, "side"). For example, uplink channels, downlink channels, etc. may also be replaced by side channels.

[0307] Likewise, the user terminal in the present disclosure may be replaced by a base station. In this case, the base station 10 may have the functions of the user terminal 20 described above.

[0308] In the present disclosure, the actions are assumed to be performed by the base station, and sometimes by its upper node (uppernode) depending on the situation. Obviously, in a network including one or more network nodes having a base station, various operations performed for communication with a terminal can be performed by the base station, one or more network nodes other than the base station (for example, considering the Mobility Management Entity (MME)), the Serving-Gateway (S-GW), etc., but not limited to these) or a combination thereof.

[0309] The various methods / implementations described in this disclosure may be used individually or in combination, and may be used in a switched manner as the method is executed. In addition, the processing procedures, sequences, flow charts, etc. of the various methods / implementations described in this disclosure may be reversed in order as long as they are not contradictory. For example, for the methods described in this disclosure, the elements of various steps are presented in an illustrative order, but are not limited to the specific order presented.

[0310] The various modes / implementations described in the present disclosure may also be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG)) (xG (x is, for example, an integer or a decimal)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), systems using other appropriate wireless communication methods, and next-generation systems expanded based on them. In addition, multiple systems can also be applied in combination (for example, LTE or LTE-A, combination with 5G, etc.).

[0311] The phrase “based on” used in the present disclosure does not mean “based only on” unless otherwise specified. In other words, the phrase “based on” means both “based only on” and “based at least on”.

[0312] Any reference to an element using the terms "first", "second", etc. used in this disclosure does not fully define the amount or order of these elements. These terms can be used in this disclosure as a convenient method to distinguish between two or more elements. Therefore, reference to the first and second elements does not mean that only two elements can be used or that the first element must take precedence over the second element in some form.

[0313] The term "determining" used in this disclosure may include a variety of actions. For example, "determining" may also refer to situations where judging, calculating, computing, processing, deriving, investigating, looking up (e.g., searching in a table, database or other data structure), ascertaining, etc. are considered to be "determining".

[0314] In addition, "judgment (decision)" may also be a situation where receiving (for example, receiving information), sending (for example, sending information), input (input), output (output), accessing (for example, accessing data in a memory), etc. are regarded as making a "judgment (decision)".

[0315] In addition, "judgment (decision)" can also be regarded as a situation where resolving, selecting, choosing, establishing, comparing, etc. are regarded as a situation where "judgment (decision)" is performed. That is, "judgment (decision)" can also be regarded as a situation where some actions are regarded as a situation where "judgment (decision)" is performed.

[0316] In addition, “judgment (decision)” can also be replaced by “assuming (assuming)”, “expecting (expecting)”, “considering (considering)” and so on.

[0317] The “maximum transmit power” recorded in the present disclosure may refer to the maximum value of the transmit power, the nominal maximum transmit power (the nominal UE maximum transmit power), or the rated maximum transmit power (the rated UE maximum transmit power).

[0318] The terms "connected", "coupled", or all their variations used in this disclosure refer to all direct or indirect connections or combinations between two or more elements, and may include the situation where one or more intermediate elements exist between two elements that are "connected" or "coupled" to each other. The combination or connection between elements may be physical, logical, or a combination thereof. For example, "connection" may also be replaced by "access".

[0319] In the present disclosure, when two elements are connected, it is possible to consider being "connected" or "combined" to each other using one or more wires, cables, printed electrical connections, etc., as well as using electromagnetic energy with wavelengths in the wireless frequency domain, microwave region, light (both visible and invisible) region, etc. as several non-limiting and non-inclusive examples.

[0320] In the present disclosure, the term "A is different from B" may also mean "A and B are different from each other". In addition, the term may also mean "A and B are different from C, respectively". The terms "separate" and "combined" may also be interpreted in the same way as "different".

[0321] When the terms “include,” “including,” and variations thereof are used in the present disclosure, these terms have an inclusive meaning, similar to the term “comprising.” Furthermore, the term “or” used in the present disclosure does not have an exclusive OR meaning.

[0322] In the present disclosure, when an article is added by translation like a, an, and the in English, for example, the present disclosure may also include a case where the noun following the article is in plural form.

[0323] The invention involved in the present disclosure has been described in detail above, but it is obvious to those skilled in the art that the invention involved in the present disclosure is not limited to the embodiments described in the present disclosure. The invention involved in the present disclosure can be implemented as a modified and altered mode without departing from the gist and scope of the invention determined based on the description of the claims. Therefore, the description of the present disclosure is for the purpose of illustrative description and does not have any limiting meaning on the invention involved in the present disclosure.

Claims

1. A terminal having: a transmitting unit, configured to transmit transmit precoding matrix indicator group capability information (TPMI group capability information) indicating a first combination of ports capable of full power transmission based on mode 2 for a first rank; and The control unit determines, based on the first combination, a second combination of ports capable of performing full-power transmission based on the mode 2 for a second rank higher than the first rank.

2. A wireless communication method of a terminal, comprising: The step of transmitting transmission precoding matrix indicator group capability information, namely, TPMI group capability information, indicating a first combination of ports capable of full power transmission based on mode 2 for a first rank; and A step of determining, based on the first combination, a second combination of ports capable of performing full-power transmission based on the mode 2 for a second rank higher than the first rank.

3. A base station, comprising: a receiving unit, receiving transmit precoding matrix indicator group capability information (TPMI group capability information) of a first combination of ports indicating that the terminal can perform full power transmission based on mode 2 for a first rank; and The control unit determines, based on the first combination, a second combination of ports of the terminal that can perform full-power transmission based on the mode 2 for a second rank higher than the first rank.

4. A system having a terminal and a base station, The terminal has: a transmitting unit, configured to transmit transmit precoding matrix indicator group capability information (TPMI group capability information) indicating a first combination of ports capable of full power transmission based on mode 2 for a first rank; and The control unit determines, based on the first combination, a second combination of ports capable of performing full-power transmission based on the mode 2 for a second rank higher than the first rank, The base station has: A receiving unit receives the TPMI group capability information.

Images